Contherm MITRE 4150 - SECTION 9 FAULT;ALARM CODES; STANDARD ALARM CODES

MANUALP/4000_SERVICE_0712 July2012
30
SECTION 9 FAULT/ALARM CODES
These codes will be shown on the temperature display, the ALARM LED
will come on and an intermittent beep will sound.
[1-.-] Under/Over Temperature
The enclosure is operating more than ±2°C from the set point.
The alarm will stop when the temperature is back within ±2°C of
the set point. Cancelled by pressing TEMP button.
[2-.-] Low CO
2
in enclosure
The CO
2
concentration is too low for too long. Not enough CO
2
to
maintain CO
2
set point. Check there is CO
2
in the bottle, turned on
and sufficient pressure (35kpa). Slightly higher pressures (upto
50kpa) may be required at very high CO2 settings. Check hose
connections. Check INJECT LED is coming on. Faulty solenoid.
Cancelled by pressing CO
2
button.
[3-.-] Enclosure running on factory Preset values
If preset values are your working values, cancel alarm. Otherwise
reset set points and check calibration. (See CALIBRATION)
Cancelled by pressing TEMP button.
[4-.-] Main Temperature Sensor broken
Main sensor broken or damaged. Call Service.
Cancelled by pressing TEMP button.
[5-.-] Wet, broken or damaged Humidity Sensor (NOT on Infra-red)
Humidity sensor wet, broken or damaged. Remove water tray from
enclosure and run for at least 24 hours while opening the doors for
1 minute every hour or so to flush the humid air from the
enclosure. This will dry the enclosure and sensor. If still not
operating correctly, call Service.
Cancelled by pressing TEMP button.
[6-.-] Low Humidity - Water tray out of water. (NOT on Infra-red)
Check tray water level and refill as necessary.
[7-.-] CO
2
Sensor damaged, broken or out of calibration
CO
2
damaged or broken or out of calibration. Recalibrate.
If still not operating correctly, call Service.
Cancelled by pressing TEMP button.